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中文摘要：
在建的某大跨度悬索桥位处东南沿海,桥塔施工时期处于台风多发期,设计风速较高.对比其他同类型的桥塔,该桥桥塔发生涡振的可能性较大,有必要在初设计阶段评价桥塔涡振性能,并考虑采取有针对性的涡振控制措施.通过裸塔气动弹性模型风洞试验,分析了桥塔在多种工况中的涡振响应特点,表明涡振效应不容忽略.比较了气动措施、机械措施以及桥塔动力特性形态和风环境因素对于涡振响应的影响.
英文摘要：
A long-span suspension bridge located at southeast coastal area of China, a typical typhoon prone region, faces a risk of vortex-induced vibration. It＇s necessary to evaluate the possibility of vortex-induced vibration of the free-standing pylon of the cable-supported bridge and to propose corresponding suppression measures. Based on a wind tunnel testing of an aeroelastic model of the fleestanding bridge pylon, a comparative study is conducted on the performance of the vortex-induced vibration of various cases. Results show that the effects of vortex-induced vibration should not be ignored during the construction stage of free-standing pylons. Some proposals about suppression efficiency of different measures are put forward, including mechanical measures, aerodynamic measures, structural dynamic modes and wind field environment.
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